genesi/linux-legacy
1
0
Fork 0
mirror of https://github.com/genesi/linux-legacy.git synced 2026-02-04 08:04:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

sfc: Fix DMA mapping cleanup in case of an error in TSO

Browse Source 
commit a7ebd27a13757248863cd61e541af7fa9e7727ee upstream.

We need buffer->len to remain valid to work out the correct address to
be unmapped.  We therefore need to clear buffer->len after the unmap
operation.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Neil Turton
2009-12-23 13:47:13 +00:00
committed by Greg Kroah-Hartman
parent 769c57aa2e
commit 1f3a1f3853
1 changed files with 2 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/sfc/tx.c
View File

@@ -823,8 +823,6 @@ static void efx_enqueue_unwind(struct efx_tx_queue *tx_queue)
tx_queue->efx->type->txd_ring_mask];
efx_tsoh_free(tx_queue, buffer);
EFX_BUG_ON_PARANOID(buffer->skb);
buffer->len = 0;
buffer->continuation = true;
if (buffer->unmap_len) {
unmap_addr = (buffer->dma_addr + buffer->len -
buffer->unmap_len);
@@ -838,6 +836,8 @@ static void efx_enqueue_unwind(struct efx_tx_queue *tx_queue)
PCI_DMA_TODEVICE);
buffer->unmap_len = 0;
}
buffer->len = 0;
buffer->continuation = true;
}
}